Let's do the math: if I was black, I woulda sold half

Instead of denying it, which wouldn’t be uncalled for, Eminem admits to one of the complaints that his critics had to say about him- his success was unfair since his popularity came from his skin color, not talent. Most educated listeners would disagree, but Eminem decides to just play along with them. But now that he has acknowledged this, the critics are going to need something new to complain about.

If you read between the lines he is also saying that he wouldn’t have gotten the recognition he deserved if he was black. Many white people would have never found out about him, thus reducing his record sales. Black people would still listen, but that’s only a small part of the American population. He is pointing out that many people in America are racist and will only listen to Em’s messages because they come from someone who looks like them.